of cincinnati



@uiten tait-a y anni @ffice IMPnovsD AMALGAMATOR.

dige Srlgchnle referrer tu it that @niet ttent mit making niet tf tige 'sn-ms.

TO ALL WHOM IT MAY CONCERN:

Ble it known that I, D. E. ROSE, of Cincinnati, in the county of Hamilton, and State of Onio, have invented a new and improved Amalgamator; and I do hereby declare the folloWing-tofbe a full, clear, andezvzact. description of the same, sufficient to enable one skilled in the art to which the invention appertains to make useof it, reference being had to the accompanying drawings, which forma part of this specification, and in which-- Figure 1 is a vertical section.

Figure 2 is a detached view ofthesectional crank connection and the spring beams.

Figures 3 and 4 are views of the grinding surfaces detached.

This apparatus consists of a kettle to contain melted lead, and a-feeding arrangement which carries the auriferous quartz to the bottom of the kettle and delivers it between grinding surfaces into the molten lead through which it rises, the gold becoming amalgamated with the lead and the quartz being scraped from the top by a paddle. i

vIn the drawings, E is a kettle supported in a furnace by the heat of which the lead in the kettle is kept in a molten state. Biis an inclined shaft, which is revolved by gearing at its upper end and provided with a. serrated plate, C, at the lower end, shown in the detached` view; the platee works in connection with the annular plate D, at the lower end of the casing X, which proceeds fromv the hopper A, tothe kettle E, entering the kettleso low down that the crushed quartz discharged from between the surfaces C Dis compelled to ascend through the lead, being brought into such intimate contact therewith as to part with its gold, which. becomes amalgamated with the lead and sinks to the bottom ot' the kettle. The shaft B has spiral anges, I, around it, which carry down the quartz forcing'it out at the bottom'between the grinding surfaces as described, anditis supported above the hopper by a spring-plate, H, which permits suchan amount of longitudinal motion as will enable the contents of the tubular casingV to pass out between the surfaces' C D. The kettle Eis preferably constructed of cast iron, and may be from two to three feet deep. The cylinder, X, and screw B b, will be of the same material, the latter from four to eight inchesI in diameter. The'plates C D are shown in two detached views, each serrated on the face, one' obliquely and the other radially. -By the arrangement of the grinding plates C D, the quartz is regularly discharged in `n`ne vparticles into the melted lead, and not in such quantity as to chill the lead, or in masses which do not expose all their metallic matter to the action of the lead bath in their upward passage. The quartz deprived of its'metal rises to the surface o f the lead and is scraped oil' by the revolving paddle K. The' shaft Bis made in two sections s'o as to give the'described longitudinal motion to the lower portion, to admit the passage of the auriferous quartz between the platesC D,

and at the same time keep the upper end in proper relation to the gearing which revolves it. 'The lower portion is supported by a shoulder on the spring-plate H, and the upper is' socketed into it inl any suitable way to admit the extension of the lower portion as the quartz `passing the plates C D draws it downward, springing the bearingpla'te H, on Whieh it is suppported and journalled. "Ihis adjustability prevents the clogging of theA quartz while bringing such a grinding pressure uponit as torcomminute it and mix it -with the leach The upper section of the shaft isset in boxes. The kettle I prefer to make bulging at the bottom, but an oblong square at the top to enable the paddle tov remove the quartz.; its contracted area at the top exposes less surface of lead to oxidization. The exposure ofthe quartz in. the case X to the action of the tire dries'it, and as the case enters the kettle from the outside and near the bottom, the quartz has the whole height of the lead through which to ascend. Noimpediment is offered by the machinery to the riseofthe quartz, n'or does the machineryy which enters the kettle tend to cool and congeal` the lead. The upper surface is free and the removal of the spent quartz unimpeded.` I can operate uponauriferous or gold-bearing sand' by this apparatus.

Having described my improvement, what I claim as new, and desire to secure by Letters Patent, is-

1. Thelcombination of the spring` bearing Il, and inclined sectional shaft- B, provided with spiral flange revolving in the case X, whieh enters4 the kettle E near the-bottom, substantially as described.

` 2. I claim the combination of the inclined casingX, provided at its lower'end with stationary grinding flange -D, and the .shaft B, provided with al grinding disk C, introduced through the side of' the kettle and operatingnear its bottom, substantially as described;` V

3. In combination with the kettle, arranged as described, I claim the revolvirgpaddleG, as described and represented..

, D. E. ROSE.

Witnesses:

G. A. Const, E. Z. STONE. 

